Device for controlling the speed of internal combustion engines



June 25, 1935. c w. BULL 7 2,005,771

DEVICE FOR CONTROLLING THE SPEED OF INTERNAL COMBUSTION ENGINES Filed Oct. 17, 1932 EB/a1;

. INVENTOR.

ATTORNEYI.

Patented June 25, 1935 v newer For: eonmoume THESPEED or INTERNAL COMBUSTION ENGINES i 1 "Clyde W. Bull, Dallas, Tex.

Application October 17, 1932', Serial No. 63$,19?

1 Claim.

This invention relates to a speed controlling device for internal combustion engines and it has particular reference to a new article of manufacture so designed that'it may be conveniently applied to the motor of a vehicle whereby to limit the speed of the vehicle.

The principal object of the invention resides in the provision, as a new article of manufacture of a simple and inexpensive expedient for preventing the driver of a vehicle from exceeding a predetermined speed and it is of particular value on new vehicles whose longevity is dependent upon careful attendance during the first few miles it is driven. New automobiles are not to be driven more than about twenty five miles per hour during the first few hundred miles, since to exceed this limit, the mechanism is likely to become impaired. The present invention therefore seeks to provide means for holding a vehicle to a predetermined speed.

Another object of the invention is to provide a device of the character specified which may be aflixed to new automobiles which are to be transported overland under their own power, making it unnecessary to depend solely uponthe honesty of the driver to hold the speed of the vehicle at or under the speed specified by the manufacturer for the first few hundred miles. I With the foregoing objects as paramount, the invention has particular reference to its salient features of construction and arrangement of parts, which will become manifest as the description proceeds, taken in connection with the ac companying drawing, in which:

Figure 1 is a fragmentary view of a conventional type of vehicle carburetor for internal combustion engines, showing one form of the invention attached.

' Figure 2 is a detail view of the form of invention shown in Figure 1 in perspective.

Figure 3 is another form of the invention in perspective, and

Figure 4 is a longitudinal sectional view of the form shown in Figure 3, fragmentarily showing an accelerator arm in connection therewith.

Continuing more in detail with the invention, I designates a fragmentary view of a conventional type of carburetor having a flange 2 which corresponds to the flange of the intake pipe of an engine manifold, not shown.

The invention is comprised of a plate 3 of such shape as to conform with the shape of the carburetor flange 2 and is adapted to be interposed between this flange and the flange of the intake pipe of the manifold by simply removing two bolts which are also not shown in the drawing but are adapted to enter the holes l, in register with similar holes in the flanges of the carburetor and manifold intake. An opening 5 is also pro vided in the plate 3 which is in register with the fuel intake port of the manifold.

Certain well known types of vehicle engines are provided with eight cylinders, while other types have only four, each type requiring a different carburetor. It is therefore necessary that the invention be constructed for application to either type of carburetor or in fact all types and in any case, only slight modification is necessary. In Figure 1 is shown in heavy lines the form of in-,- vention used in connection with a carburetor especially suited for an eight cylinder engine and in which the actuating arm 6 is suspended from a pivot at the side of the carburetor to move in an arcuate path. It is intended that the present invention be so disposed relative to the arm 6 as to limit its movement at a predetermined point,-

5 PATENT OFFICE thereby allowing the carburetor throttle valve to be only partially opened. Hence the speed of the motor is limited by reason of the fact that the amount of fuel drawn thereinto is limited.

The plate 3 of the structure shown in Figures 1 In the absence of some means for prevention,

the projection l of the plate 3 may be bent out.- wardly so that the arm 6 of the carburetor may escape the same but as a precaution, and as a means to detect any efforts to tamper with the control, a wire 9 is passed about the lower portion of the carburetor I, and through an aperture Iii in the invention and the two free ends of the wire 9 are joined together by means of an ordinary lead seal M. Should this seal be removed or tampered with, the driver of the vehicle may be held responsible for any defects which might be found in the motor as a result of improper handling of the vehicle.

In Figures 3 and 4 is shown amodified form of the invention and is constructed similarly to the form shown in Figures 1 and 2 except that instead of the upwardly extending portion providing an abutment for the carburetor actuating arm, it is provided with an aperture l2 through 'the fuel intake pipe of the engine manifold.

which the control arm I3 of the carburetor extends. The accelerator rod is designated at a in Figure 4. The plate I4 is substantially the same as the plate 3 and is provided with bolt holes IS with an opening H5 in its center to register with It will be noted that the aperture I2 is rectangular and is of a definite length in order to limit the movement of the arm l3 in the manner shown in dotted lines in Figure 4 to thereby limit the opening action of the throttle valve of the carburetor to which the device is attached. Should it be desired to increase the stroke of the arm I3, it

which case the motor may be accelerated to an authorized speed. i

Manifestly, the constructionv shown capable of some modification and such modification as is considered within the scope and meaning of the appended claim is also considered within the spirit and intent of the invention.

What is claimed is:

A device for controlling the speed of an internal combustion engine including a base plate having a central opening therein and adapted to be received between the carburetor and the intake manifold of said engine, an up'wa rdly and outwardly extending projection'integ'ral ;with said base plate, said upwardly and outwardly extending projection terminating ina horizontally extending portion adapted to prevent opening of the throttle beyond'a predetermined position, said latter portionbeing arranged to lie in a plane parallel with said base, said upwardly extending portion having an aperture to receive a sealing means. v

' CLYDE W. BULL. 

